yahoo.com

Checked 22 October 2026, 11:36 UTC · via 8.8.8.8
!Passed with warnings
26 passed 1 warning 0 failed 4 info

Registration

info

.com generic · MarkMonitor Inc. · expires 2027-01-19

Found

TLD
.com (generic)
ICANN policies apply
yes
Registrar
MarkMonitor Inc.
Registered
18 January 1995
Last changed
18 December 2025
Expires
19 January 2027
Status
client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited
Registry nameservers
ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com
RDAP server
https://rdap.verisign.com/com/v1/

Checks

  • i
    .com is a generic TLD (gTLD)
    Generic TLD under an ICANN registry agreement: ICANN-accredited registrars, UDRP and RDAP apply.
    #1
  • ✓ TLD delegated and signed #2
    .com is delegated in the root zone and DNSSEC-signed.
  • ✓ Expires on 2027-01-19 #3
    The registration is valid until 2027-01-19 (88 days).
  • ✓ Transfer locked #4
    Registry status: client delete prohibited, client transfer prohibited, client update prohibited, server delete prohibited, server transfer prohibited, server update prohibited.
  • ✓ Registry and delegation match #5
    The nameservers registered at the registry are the ones published in DNS.

Delegation

info

ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com

Found

Parent zone
com
Delegation from
a.gtld-servers.net (192.5.6.30)
NS at the parent
ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com
NS in the zone
ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com
NameserverAddressesNetwork (AS)Glue
ns1.yahoo.com68.180.131.16 2001:4998:1b0::7961:686f:6f21AS10310 YAHOO-1 - Yahoo Holdings Inc., US AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US2001:4998:1b0::7961:686f:6f21 68.180.131.16
ns2.yahoo.com68.142.255.16 2001:4998:1c0::7961:686f:6f21AS7280 YAHOO-FC - Yahoo Holdings Inc., US AS7280 YAHOO-FC - Yahoo Holdings Inc., US2001:4998:1c0::7961:686f:6f21 68.142.255.16
ns3.yahoo.com27.123.42.42 2406:8600:f03f:1f8::1003AS23879 YAHOO-INY - INY Edge site, US AS23879 YAHOO-INY - INY Edge site, US2406:8600:f03f:1f8::1003 27.123.42.42
ns4.yahoo.com98.138.11.157AS36646 YAHOO-NE1 - Yahoo Holdings Inc., US98.138.11.157
ns5.yahoo.com202.165.97.53 2406:2000:1d0::7961:686f:6f21AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US AS10880 YAHOO-AN2 - Yahoo Holdings Inc., US202.165.97.53 2406:2000:1d0::7961:686f:6f21

Checks

  • ✓ 5 nameservers #6
    Delegated to ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com.
  • ✓ Parent and zone agree #7
    The parent delegation and the zone's NS records list the same nameservers.
  • ✓ Glue present and correct #8
    Glue is published for the nameservers inside the zone: ns1.yahoo.com, ns2.yahoo.com, ns3.yahoo.com, ns4.yahoo.com, ns5.yahoo.com.
  • ✓ All names resolve #9
    Every nameserver name has an address and is not an alias.
  • ✓ Nameservers in different networks #10
    The nameservers are spread over 5 IPv4 /24s and 4 IPv6 /48s.
  • ✓ 5 autonomous systems #11
    The nameservers are spread over: AS10310 (YAHOO-1 - Yahoo Holdings Inc., US): 1 address; AS10880 (YAHOO-AN2 - Yahoo Holdings Inc., US): 3 addresses; AS23879 (YAHOO-INY - INY Edge site, US): 2 addresses; AS36646 (YAHOO-NE1 - Yahoo Holdings Inc., US): 1 address; AS7280 (YAHOO-FC - Yahoo Holdings Inc., US): 2 addresses.
  • i
    All nameserver names under .com
    All nameserver names are under one TLD, so a problem with that TLD also makes the nameservers unreachable. Some operators use names under two TLDs for extra resilience.
    #12
  • i
    Partly IPv6
    These nameservers have no IPv6 address: ns4.yahoo.com.
    #13

Nameservers

info

9 of 9 addresses answer authoritatively

Found

NameserverAnswerRecursionTCP / EDNSAXFRVersion
ns1.yahoo.com 68.180.131.16NOERROR, 20 ms, authoritativenoyes / yesrefusedYahoo
ns1.yahoo.com 2001:4998:1b0::7961:686f:6f21NOERROR, 19 ms, authoritativenoyes / yesrefusedYahoo
ns2.yahoo.com 68.142.255.16NOERROR, 3 ms, authoritativenoyes / yesrefusedYahoo
ns2.yahoo.com 2001:4998:1c0::7961:686f:6f21NOERROR, 9 ms, authoritativenoyes / yesrefusedYahoo
ns3.yahoo.com 27.123.42.42NOERROR, 183 ms, authoritativenoyes / yesrefusedYahoo
ns3.yahoo.com 2406:8600:f03f:1f8::1003NOERROR, 136 ms, authoritativenoyes / yesrefusedYahoo
ns4.yahoo.com 98.138.11.157NOERROR, 119 ms, authoritativenoyes / yesrefusedYahoo
ns5.yahoo.com 202.165.97.53NOERROR, 181 ms, authoritativenoyes / yesrefusedYahoo
ns5.yahoo.com 2406:2000:1d0::7961:686f:6f21NOERROR, 242 ms, authoritativenoyes / yesrefusedYahoo

Checks

  • ✓ All respond #14
    All 9 nameserver addresses answered.
  • ✓ All authoritative #15
    Every responding nameserver answers authoritatively for the zone.
  • ✓ No recursion #16
    The nameservers do not answer recursive queries for other domains.
  • i
    Identifying string disclosed
    These nameservers answer version queries with a string that is not a version number: ns1.yahoo.com: "Yahoo"; ns2.yahoo.com: "Yahoo"; ns3.yahoo.com: "Yahoo"; ns4.yahoo.com: "Yahoo"; ns5.yahoo.com: "Yahoo".
    #17
  • ✓ Zone transfers refused #18
    No nameserver allows a zone transfer to the public.
  • ✓ TCP supported #19
    All nameservers answer over TCP.
  • ✓ EDNS supported #20
    All nameservers support EDNS(0).
  • ✓ Public addresses #21
    All nameserver addresses are publicly routable.

SOA

pass

serial 2026102201 · primary ns1.yahoo.com

Found

Primary (MNAME)
ns1.yahoo.com
Contact (RNAME)
hostmaster.yahoo-inc.com
Serial
2026102201
Refresh / retry
3600 s / 300 s
Expire
1814400 s
Negative TTL
600 s

Serial per nameserver

NameserverSerial
ns1.yahoo.com (68.180.131.16)2026102201
ns1.yahoo.com (2001:4998:1b0::7961:686f:6f21)2026102201
ns2.yahoo.com (68.142.255.16)2026102201
ns2.yahoo.com (2001:4998:1c0::7961:686f:6f21)2026102201
ns3.yahoo.com (27.123.42.42)2026102201
ns3.yahoo.com (2406:8600:f03f:1f8::1003)2026102201
ns4.yahoo.com (98.138.11.157)2026102201
ns5.yahoo.com (202.165.97.53)2026102201
ns5.yahoo.com (2406:2000:1d0::7961:686f:6f21)2026102201

Checks

  • ✓ Serial 2026102201 everywhere #22
    All nameservers serve the same version of the zone.
  • ✓ Timers within recommendations #23
    SOA refresh 1h, retry 5m, expire 21d, negative TTL 10m.
  • ✓ Primary is a public nameserver #24
    The primary nameserver ns1.yahoo.com is one of the listed nameservers.
  • ✓ Contact hostmaster@yahoo-inc.com #25
    The SOA RNAME hostmaster.yahoo-inc.com means hostmaster@yahoo-inc.com.
  • ✓ Date-based serial #26
    The serial 2026102201 follows the YYYYMMDDnn convention (2026-10-22).

DNSSEC

warn

Not signed

Found

Validated by resolver
no

Checks

  • !
    Not signed
    The zone is not signed with DNSSEC, so answers can be spoofed. Enable DNSSEC at your DNS provider and publish the DS record at your registrar.
    #27

Records

pass

37 records at the apex

Found

Read from
68.180.131.16:53
TypeValueTTL
SOAns1.yahoo.com. hostmaster.yahoo-inc.com. 2026102201 3600 300 1814400 6001800
NSns2.yahoo.com.172800
NSns1.yahoo.com.172800
NSns3.yahoo.com.172800
NSns4.yahoo.com.172800
NSns5.yahoo.com.172800
A74.6.143.261800
A74.6.231.201800
A74.6.231.211800
A98.137.11.1631800
A98.137.11.1641800
A74.6.143.251800
AAAA2001:4998:124:1507::f0001800
AAAA2001:4998:124:1507::f0011800
AAAA2001:4998:44:3507::80001800
AAAA2001:4998:24:120d::1:01800
AAAA2001:4998:44:3507::80011800
AAAA2001:4998:24:120d::1:11800
MX1 mta7.am0.yahoodns.net.1800
MX1 mta6.am0.yahoodns.net.1800
MX1 mta5.am0.yahoodns.net.1800
TXT"google-site-verification=Z3-Vh6zqUMgybVH4wQl1GxKSKN7JE13kyCyeZ3TZZ-I"1800
TXT"facebook-domain-verification=gysqrcd69g0ej34f4jfn0huivkym1p"1800
TXT"google-site-verification=GLp01gkFNopm_JItbLxml4iuVbTgJa3rKu0-eq1RvsE"1800
TXT"google-site-verification=2b8irRvU5a2h4Mb-H_fdqNrqWjS00qmPfPcWqm8BhxI"1800
TXT"Zoom=13284637"1800
TXT"google-site-verification=w4N2bNopAWw1xYrdXKORILxx-WW3_LIiyX6dIMIidgk"1800
TXT"google-site-verification=2b0Glh8l2icXIAgAcjOcFx16Jt26yWDgEyrk5hPD-ZY"1800
TXT"_globalsign-domain-verification=3rQPnwMFlx5UmUzSMV-JeDoNEMeG8BYFKvKDsHEzr9"1800
TXT"v=spf1 redirect=_spf.mail.yahoo.com"1800
TXT"google-site-verification=GU8WAl0zPqaxdcZqDjuN7pqdfPCpR9Amz9rwxMG91qw"1800
TXT"google-site-verification=xoBvU6aKxP0gYgNL0iXqF0EccAg6nFrO7XxsHnc3iNQ"1800
TXT"edb3bff2c0d64622a9b2250438277a59"1800
CAA0 iodef "mailto:security@yahooinc.com"1800
CAA0 issue "sectigo.com"1800
CAA0 issue "globalsign.com"1800
CAA0 issue "digicert.com"1800

Checks

  • ✓ TTLs within range #32
    TTLs: A 30m, AAAA 30m, MX 30m, NS 2d.
  • ✓ No CNAME at the apex #33
    The zone apex has no CNAME record.
  • ✓ No wildcard #34
    Names that don't exist return NXDOMAIN.
  • ✓ CAA restricts issuance #35
    Certificates may be issued by: sectigo.com, globalsign.com, digicert.com.